User interface for a portion of a display screen



FIG. 1 is a front view of a user interface for a portion of a displayscreen showing my new design.

FIG. 2 is an additional view of a user interface for a portion of adisplay screen showing my new design, with alternate broken linefeatures; and,

FIG. 3 is an additional view of a user interface for a portion of adisplay screen showing my new design, with alternate broken linefeatures.

The portions shown in broken line are for illustrative purposes only andform no part of the claimed design.

The ornamental design for a user interface for a portion of a displayscreen, as shown and described.